Promise based HTTP client for the browser and node.js
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Installing
Package manager
Using npm:
$ npm install axios
Using bower:
$ bower install axios
Using yarn:
$ yarn add axios
Using pnpm:
$ pnpm add axios
Once the package is installed, you can import the library using import or require approach:
import axios, {isCancel, AxiosError} from 'axios';
You can also use the default export, since the named export is just a re-export from the Axios factory:
import axios from 'axios';console.log(axios.isCancel('something'));
If you use require for importing, only default export is available:
const axios = require('axios');console.log(axios.isCancel('something'));``` {data-source-line="145"} For cases where something went wrong when trying to import a module into a custom or legacy environment, you can try importing the module package directly:```jsconst axios = require('axios/dist/browser/axios.cjs'); // browser commonJS bundle (ES2017)// const axios = require('axios/dist/node/axios.cjs'); // node commonJS bundle (ES2017)``` {data-source-line="153"} ### CDN Using jsDelivr CDN (ES5 UMD browser module):```html``` {data-source-line="161"} Using unpkg CDN:```html``` {data-source-line="167"} ## Example > **Note**: CommonJS usage > In order to gain the TypeScript typings (for intellisense / autocomplete) while using CommonJS imports with `require()`, use the following approach:```jsimport axios from 'axios';//const axios = require('axios'); // legacy way// Make a request for a user with a given IDaxios.get('/user?ID=12345') .then(function (response) { // handle success console.log(response); }) .catch(function (error) { // handle error console.log(error); }) .finally(function () { // always executed });// Optionally the request above could also be done asaxios.get('/user', { params: { ID: 12345 } }) .then(function (response) { console.log(response); }) .catch(function (error) { console.log(error); }) .finally(function () { // always executed });// Want to use async/await? Add the `async` keyword to your outer function/method.async function getUser() { try { const response = await axios.get('/user?ID=12345'); console.log(response); } catch (error) { console.error(error); }}``` {data-source-line="217"} > **Note**: `async/await` is part of ECMAScript 2017 and is not supported in Internet > Explorer and older browsers, so use with caution. Performing a `POST` request```js axios.post('/user', { firstName: 'Fred', lastName: 'Flintstone' }) .then(function (response) { console.log(response); }) .catch(function (error) { console.log(error); });``` {data-source-line="235"} Performing multiple concurrent requests```jsfunction getUserAccount() { return axios.get('/user/12345');}function getUserPermissions() { return axios.get('/user/12345/permissions');}Promise.all([getUserAccount(), getUserPermissions()]) .then(function (results) { const acct = results[0]; const perm = results[1]; });``` {data-source-line="253"} ## axios API Requests can be made by passing the relevant config to `axios`. ##### axios(config)```js// Send a POST requestaxios({ method: 'post', url: '/user/12345', data: { firstName: 'Fred', lastName: 'Flintstone' }});``` {data-source-line="271"}```js// GET request for remote image in node.jsaxios({ method: 'get', url: 'https://bit.ly/2mTM3nY', responseType: 'stream'}) .then(function (response) { response.data.pipe(fs.createWriteStream('ada_lovelace.jpg')) });``` {data-source-line="283"} ##### axios(url[, config])```js// Send a GET request (default method)axios('/user/12345');``` {data-source-line="290"} ### Request method aliases For convenience, aliases have been provided for all common request methods. ##### axios.request(config) ##### axios.get(url[, config]) ##### axios.delete(url[, config]) ##### axios.head(url[, config]) ##### axios.options(url[, config]) ##### axios.post(url[, data[, config]]) ##### axios.put(url[, data[, config]]) ##### axios.patch(url[, data[, config]]) ###### NOTE When using the alias methods `url`, `method`, and `data` properties don't need to be specified in config. ### Concurrency (Deprecated) Please use `Promise.all` to replace the below functions. Helper functions for dealing with concurrent requests. axios.all(iterable) axios.spread(callback) ### Creating an instance You can create a new instance of axios with a custom config. ##### axios.create([config])```jsconst instance = axios.create({ baseURL: 'https://some-domain.com/api/', timeout: 1000, headers: {'X-Custom-Header': 'foobar'}});``` {data-source-line="328"} ### Instance methods The available instance methods are listed below. The specified config will be merged with the instance config. ##### axios#request(config) ##### axios#get(url[, config]) ##### axios#delete(url[, config]) ##### axios#head(url[, config]) ##### axios#options(url[, config]) ##### axios#post(url[, data[, config]]) ##### axios#put(url[, data[, config]]) ##### axios#patch(url[, data[, config]]) ##### axios#getUri([config]) ## Request Config These are the available config options for making requests. Only the `url` is required. Requests will default to `GET` if `method` is not specified.```js{ // `url` is the server URL that will be used for the request url: '/user', // `method` is the request method to be used when making the request method: 'get', // default // `baseURL` will be prepended to `url` unless `url` is absolute. // It can be convenient to set `baseURL` for an instance of axios to pass relative URLs // to methods of that instance. baseURL: 'https://some-domain.com/api/', // `transformRequest` allows changes to the request data before it is sent to the server // This is only applicable for request methods 'PUT', 'POST', 'PATCH' and 'DELETE' // The last function in the array must return a string or an instance of Buffer, ArrayBuffer, // FormData or Stream // You may modify the headers object. transformRequest: [function (data, headers) { // Do whatever you want to transform the data return data; }], // `transformResponse` allows changes to the response data to be made before // it is passed to then/catch transformResponse: [function (data) { // Do whatever you want to transform the data return data; }], // `headers` are custom headers to be sent headers: {'X-Requested-With': 'XMLHttpRequest'}, // `params` are the URL parameters to be sent with the request // Must be a plain object or a URLSearchParams object params: { ID: 12345 }, // `paramsSerializer` is an optional config that allows you to customize serializing `params`. paramsSerializer: { //Custom encoder function which sends key/value pairs in an iterative fashion. encode?: (param: string): string => { /* Do custom operations here and return transformed string */ }, // Custom serializer function for the entire parameter. Allows user to mimic pre 1.x behaviour. serialize?: (params: Record, options?: ParamsSerializerOptions ), //Configuration for formatting array indexes in the params. indexes: false // Three available options: (1) indexes: null (leads to no brackets), (2) (default) indexes: false (leads to empty brackets), (3) indexes: true (leads to brackets with indexes). }, // `data` is the data to be sent as the request body // Only applicable for request methods 'PUT', 'POST', 'DELETE , and 'PATCH' // When no `transformRequest` is set, must be of one of the following types: // - string, plain object, ArrayBuffer, ArrayBufferView, URLSearchParams // - Browser only: FormData, File, Blob // - Node only: Stream, Buffer, FormData (form-data package) data: { firstName: 'Fred' }, // syntax alternative to send data into the body // method post // only the value is sent, not the key data: 'Country=Brasil&City=Belo Horizonte', // `timeout` specifies the number of milliseconds before the request times out. // If the request takes longer than `timeout`, the request will be aborted. timeout: 1000, // default is `0` (no timeout) // `withCredentials` indicates whether or not cross-site Access-Control requests // should be made using credentials withCredentials: false, // default // `adapter` allows custom handling of requests which makes testing easier. // Return a promise and supply a valid response (see lib/adapters/README.md). adapter: function (config) { /* ... */ }, // `auth` indicates that HTTP Basic auth should be used, and supplies credentials. // This will set an `Authorization` header, overwriting any existing // `Authorization` custom headers you have set using `headers`. // Please note that only HTTP Basic auth is configurable through this parameter. // For Bearer tokens and such, use `Authorization` custom headers instead. auth: { username: 'janedoe', password: 's00pers3cret' }, // `responseType` indicates the type of data that the server will respond with // options are: 'arraybuffer', 'document', 'json', 'text', 'stream' // browser only: 'blob' responseType: 'json', // default // `responseEncoding` indicates encoding to use for decoding responses (Node.js only) // Note: Ignored for `responseType` of 'stream' or client-side requests responseEncoding: 'utf8', // default // `xsrfCookieName` is the name of the cookie to use as a value for xsrf token xsrfCookieName: 'XSRF-TOKEN', // default // `xsrfHeaderName` is the name of the http header that carries the xsrf token value xsrfHeaderName: 'X-XSRF-TOKEN', // default // `undefined` (default) - set XSRF header only for the same origin requests withXSRFToken: boolean | undefined | ((config: InternalAxiosRequestConfig) => boolean | undefined), // `onUploadProgress` allows handling of progress events for uploads // browser & node.js onUploadProgress: function ({loaded, total, progress, bytes, estimated, rate, upload = true}) { // Do whatever you want with the Axios progress event }, // `onDownloadProgress` allows handling of progress events for downloads // browser & node.js onDownloadProgress: function ({loaded, total, progress, bytes, estimated, rate, download = true}) { // Do whatever you want with the Axios progress event }, // `maxContentLength` defines the max size of the http response content in bytes allowed in node.js maxContentLength: 2000, // `maxBodyLength` (Node only option) defines the max size of the http request content in bytes allowed maxBodyLength: 2000, // `validateStatus` defines whether to resolve or reject the promise for a given // HTTP response status code. If `validateStatus` returns `true` (or is set to `null` // or `undefined`), the promise will be resolved; otherwise, the promise will be // rejected. validateStatus: function (status) { return status >= 200 && status < 300; // default }, // `maxRedirects` defines the maximum number of redirects to follow in node.js. // If set to 0, no redirects will be followed. maxRedirects: 21, // default // `beforeRedirect` defines a function that will be called before redirect. // Use this to adjust the request options upon redirecting, // to inspect the latest response headers, // or to cancel the request by throwing an error // If maxRedirects is set to 0, `beforeRedirect` is not used. beforeRedirect: (options, { headers }) => { if (options.hostname === "example.com") { options.auth = "user:password"; } }, // `socketPath` defines a UNIX Socket to be used in node.js. // e.g. '/var/run/docker.sock' to send requests to the docker daemon. // Only either `socketPath` or `proxy` can be specified. // If both are specified, `socketPath` is used. socketPath: null, // default // `transport` determines the transport method that will be used to make the request. If defined, it will be used. Otherwise, if `maxRedirects` is 0, the default `http` or `https` library will be used, depending on the protocol specified in `protocol`. Otherwise, the `httpFollow` or `httpsFollow` library will be used, again depending on the protocol, which can handle redirects. transport: undefined, // default // `httpAgent` and `httpsAgent` define a custom agent to be used when performing http // and https requests, respectively, in node.js. This allows options to be added like // `keepAlive` that are not enabled by default. httpAgent: new http.Agent({ keepAlive: true }), httpsAgent: new https.Agent({ keepAlive: true }), // `proxy` defines the hostname, port, and protocol of the proxy server. // You can also define your proxy using the conventional `http_proxy` and // `https_proxy` environment variables. If you are using environment variables // for your proxy configuration, you can also define a `no_proxy` environment // variable as a comma-separated list of domains that should not be proxied. // Use `false` to disable proxies, ignoring environment variables. // `auth` indicates that HTTP Basic auth should be used to connect to the proxy, and // supplies credentials. // This will set an `Proxy-Authorization` header, overwriting any existing // `Proxy-Authorization` custom headers you have set using `headers`. // If the proxy server uses HTTPS, then you must set the protocol to `https`. proxy: { protocol: 'https', host: '127.0.0.1', // hostname: '127.0.0.1' // Takes precedence over 'host' if both are defined port: 9000, auth: { username: 'mikeymike', password: 'rapunz3l' } }, // `cancelToken` specifies a cancel token that can be used to cancel the request // (see Cancellation section below for details) cancelToken: new CancelToken(function (cancel) { }), // an alternative way to cancel Axios requests using AbortController signal: new AbortController().signal, // `decompress` indicates whether or not the response body should be decompressed // automatically. If set to `true` will also remove the 'content-encoding' header // from the responses objects of all decompressed responses // - Node only (XHR cannot turn off decompression) decompress: true, // default // `insecureHTTPParser` boolean. // Indicates where to use an insecure HTTP parser that accepts invalid HTTP headers. // This may allow interoperability with non-conformant HTTP implementations. // Using the insecure parser should be avoided. // see options https://nodejs.org/dist/latest-v12.x/docs/api/http.html#http_http_request_url_options_callback // see also https://nodejs.org/en/blog/vulnerability/february-2020-security-releases/#strict-http-header-parsing-none insecureHTTPParser: undefined, // default // transitional options for backward compatibility that may be removed in the newer versions transitional: { // silent JSON parsing mode // `true` - ignore JSON parsing errors and set response.data to null if parsing failed (old behaviour) // `false` - throw SyntaxError if JSON parsing failed (Note: responseType must be set to 'json') silentJSONParsing: true, // default value for the current Axios version // try to parse the response string as JSON even if `responseType` is not 'json' forcedJSONParsing: true, // throw ETIMEDOUT error instead of generic ECONNABORTED on request timeouts clarifyTimeoutError: false, }, env: { // The FormData class to be used to automatically serialize the payload into a FormData object FormData: window?.FormData || global?.FormData }, formSerializer: { visitor: (value, key, path, helpers) => {}; // custom visitor function to serialize form values dots: boolean; // use dots instead of brackets format metaTokens: boolean; // keep special endings like {} in parameter key indexes: boolean; // array indexes format null - no brackets, false - empty brackets, true - brackets with indexes }, // http adapter only (node.js) maxRate: [ 100 * 1024, // 100KB/s upload limit, 100 * 1024 // 100KB/s download limit ]}``` {data-source-line="591"} ## Response Schema The response for a request contains the following information.```js{ // `data` is the response that was provided by the server data: {}, // `status` is the HTTP status code from the server response status: 200, // `statusText` is the HTTP status message from the server response statusText: 'OK', // `headers` the HTTP headers that the server responded with // All header names are lowercase and can be accessed using the bracket notation. // Example: `response.headers['content-type']` headers: {}, // `config` is the config that was provided to `axios` for the request config: {}, // `request` is the request that generated this response // It is the last ClientRequest instance in node.js (in redirects) // and an XMLHttpRequest instance in the browser request: {}}``` {data-source-line="621"} When using `then`, you will receive the response as follows:```js axios.get('/user/12345') .then(function (response) { console.log(response.data); console.log(response.status); console.log(response.statusText); console.log(response.headers); console.log(response.config); });``` {data-source-line="634"} When using `catch`, or passing a [rejection callback](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/then) as second parameter of `then`, the response will be available through the `error` object as explained in the [Handling Errors](#handling-errors) section. ## Config Defaults You can specify config defaults that will be applied to every request. ### Global axios defaults```js axios.defaults.baseURL = 'https://api.example.com';// Important: If axios is used with multiple domains, the AUTH_TOKEN will be sent to all of them.// See below for an example using Custom instance defaults instead.axios.defaults.headers.common['Authorization'] = AUTH_TOKEN;axios.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded';``` {data-source-line="652"} ### Custom instance defaults```js// Set config defaults when creating the instanceconst instance = axios.create({ baseURL: 'https://api.example.com'});// Alter defaults after instance has been createdinstance.defaults.headers.common['Authorization'] = AUTH_TOKEN;``` {data-source-line="664"} ### Config order of precedence Config will be merged with an order of precedence. The order is library defaults found in [lib/defaults.js](https://github.com/axios/axios/blob/master/lib/defaults/index.js#L28), then `defaults` property of the instance, and finally `config` argument for the request. The latter will take precedence over the former. Here's an example.```js// Create an instance using the config defaults provided by the library// At this point the timeout config value is `0` as is the default for the libraryconst instance = axios.create();// Override timeout default for the library// Now all requests using this instance will wait 2.5 seconds before timing outinstance.defaults.timeout = 2500;// Override timeout for this request as it's known to take a long timeinstance.get('/longRequest', { timeout: 5000});``` {data-source-line="683"} ## Interceptors You can intercept requests or responses before they are handled by `then` or `catch`.```js// Add a request interceptoraxios.interceptors.request.use(function (config) { // Do something before request is sent return config; }, function (error) { // Do something with request error return Promise.reject(error); });// Add a response interceptoraxios.interceptors.response.use(function (response) { // Any status code that lie within the range of 2xx cause this function to trigger // Do something with response data return response; }, function (error) { // Any status codes that falls outside the range of 2xx cause this function to trigger // Do something with response error return Promise.reject(error); });``` {data-source-line="709"} If you need to remove an interceptor later you can.```jsconst myInterceptor = axios.interceptors.request.use(function () {/*...*/});axios.interceptors.request.eject(myInterceptor);``` {data-source-line="716"} You can also clear all interceptors for requests or responses.```jsconst instance = axios.create();instance.interceptors.request.use(function () {/*...*/});instance.interceptors.request.clear(); // Removes interceptors from requestsinstance.interceptors.response.use(function () {/*...*/});instance.interceptors.response.clear(); // Removes interceptors from responses``` {data-source-line="725"} You can add interceptors to a custom instance of axios.```jsconst instance = axios.create();instance.interceptors.request.use(function () {/*...*/});``` {data-source-line="732"} When you add request interceptors, they are presumed to be asynchronous by default. This can cause a delay in the execution of your axios request when the main thread is blocked (a promise is created under the hood for the interceptor and your request gets put on the bottom of the call stack). If your request interceptors are synchronous you can add a flag to the options object that will tell axios to run the code synchronously and avoid any delays in request execution.```js axios.interceptors.request.use(function (config) { config.headers.test = 'I am only a header!'; return config;}, null, { synchronous: true });``` {data-source-line="744"} If you want to execute a particular interceptor based on a runtime check, you can add a `runWhen` function to the options object. The interceptor will not be executed **if and only if** the return of `runWhen` is `false`. The function will be called with the config object (don't forget that you can bind your own arguments to it as well.) This can be handy when you have an asynchronous request interceptor that only needs to run at certain times.```jsfunction onGetCall(config) { return config.method === 'get';}axios.interceptors.request.use(function (config) { config.headers.test = 'special get headers'; return config;}, null, { runWhen: onGetCall });``` {data-source-line="760"} ### Multiple Interceptors Given you add multiple response interceptors and when the response was fulfilled - then each interceptor is executed - then they are executed in the order they were added - then only the last interceptor's result is returned - then every interceptor receives the result of its predecessor - and when the fulfillment-interceptor throws - then the following fulfillment-interceptor is not called - then the following rejection-interceptor is called - once caught, another following fulfill-interceptor is called again (just like in a promise chain). Read [the interceptor tests](./test/specs/interceptors.spec.js) for seeing all this in code. ## Error Types There are many different axios error messages that can appear that can provide basic information about the specifics of the error and where opportunities may lie in debugging. The general structure of axios errors is as follows: | Property | Definition | | -------- | ---------- | | message | A quick summary of the error message and the status it failed with. | | name | This defines where the error originated from. For axios, it will always be an 'AxiosError'. | | stack | Provides the stack trace of the error. | | config | An axios config object with specific instance configurations defined by the user from when the request was made | | code | Represents an axios identified error. The table below lists out specific definitions for internal axios error. | | status | HTTP response status code. See [here](https://en.wikipedia.org/wiki/List_of_HTTP_status_codes) for common HTTP response status code meanings. Below is a list of potential axios identified error | Code | Definition | | -------- | ---------- | | ERR_BAD_OPTION_VALUE | Invalid or unsupported value provided in axios configuration. | | ERR_BAD_OPTION | Invalid option provided in axios configuration. | | ECONNABORTED | Request timed out due to exceeding timeout specified in axios configuration. | | ETIMEDOUT | Request timed out due to exceeding default axios timelimit. | | ERR_NETWORK | Network-related issue. | ERR_FR_TOO_MANY_REDIRECTS | Request is redirected too many times; exceeds max redirects specified in axios configuration. | ERR_DEPRECATED | Deprecated feature or method used in axios. | ERR_BAD_RESPONSE | Response cannot be parsed properly or is in an unexpected format. | ERR_BAD_REQUEST | Requested has unexpected format or missing required parameters. | | ERR_CANCELED | Feature or method is canceled explicitly by the user. | ERR_NOT_SUPPORT | Feature or method not supported in the current axios environment. | ERR_INVALID_URL | Invalid URL provided for axios request. ## Handling Errors the default behavior is to reject every response that returns with a status code that falls out of the range of 2xx and treat it as an error.```js axios.get('/user/12345') .catch(function (error) { if (error.response) { // The request was made and the server responded with a status code // that falls out of the range of 2xx console.log(error.response.data); console.log(error.response.status); console.log(error.response.headers); } else if (error.request) { // The request was made but no response was received // `error.request` is an instance of XMLHttpRequest in the browser and an instance of // http.ClientRequest in node.js console.log(error.request); } else { // Something happened in setting up the request that triggered an Error console.log('Error', error.message); } console.log(error.config); });``` {data-source-line="831"} Using the `validateStatus` config option, you can override the default condition (status >= 200 && status < 300) and define HTTP code(s) that should throw an error.```js axios.get('/user/12345', { validateStatus: function (status) { return status < 500; // Resolve only if the status code is less than 500 }})``` {data-source-line="841"} Using `toJSON` you get an object with more information about the HTTP error.```js axios.get('/user/12345') .catch(function (error) { console.log(error.toJSON()); });``` {data-source-line="850"} ## Cancellation ### AbortController Starting from `v0.22.0` Axios supports AbortController to cancel requests in fetch API way:```jsconst controller = new AbortController();axios.get('/foo/bar', { signal: controller.signal}).then(function(response) { //...});// cancel the requestcontroller.abort()``` {data-source-line="868"} ### CancelToken `